Automatic spindle-stop.



H. M. NORRIS.

AUTOMATIC SPINDLE STOP. APPLICATION FILED 00T.1,' 1910 Patented 1819119,1912.

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HENRY in. NORRIS, or onvcrivueri, onto, sssrsnon so THE CINCINNATIisroxronn TOOL cor/[Penney ornomnarr, OHIO, A oonronarron' or OHIO.

AUTOMATIC SP INDLE-STO P.

stops adapted to the use of radial drills or for'other suitablepurposes, and the objects or my improvements are to provide safety stopmechanism for automatically limiting the longitudinal movement of thespindle; to provide mechanism for limiting the longitudinal movement ofthe spindle to different predetermined points as indicated by anadjustable dial depth gage, and to provide. simple and durableconstruction and assemblage of the different members for securingfacility elf operation and efficiency of action. These objects areattained in the following ac coinpanying drawings. in which Figure 1 isa horizontal, section of an automatic spindle stop embodying myimprovements; Fig. 2 a front elevation; Fig. 3 a vertical section on theline (r -a of Fig. 1; Fig. flat a vertical section on the linebb of Fig.1 with parts broken away; Fig. 5 a

portion of the face of the sleeve rack, and Fig. 6 a front elevationwith parts in section and parts broken away of the locking plunhers.

ing wherein a horizontal shaft 2 provided with a pinion 3 1s ournaledand also where:

in the sleeve 4 for the spindle 6 is mounted to slide vertically, saidsleeve is provided with a rack 7 in engagement with the' pinionv wherebythe sleeve with the spindle may be actuated longitudinally within thehearing 1. A worm wheel 8 formed with a c1r cular recess or counter-bore9 in one end and journaled within bearings 11 and twin cam lovers 16which-inovably engage with the corresponding ends of the friction ISpecification of Letters Patent.

Application filed Getober l, 1910. Serial No. 584,830.

In the drawings, 1 represents a fixed bear ring 12. A locking plunger 17formed with an annular groove 18 having taper sides. and with a taperpoint 19 is slidably mounted in an opening formed in member 14L A. hand.lever-"21'fulcrumed on member 14.- engages with and serves to move saidplunger with its point between the twin levers 1.6 for separating themand thereby ex 'panding the friction ring into frictional en-'gagen'ient with the worm wheel whereby the shaft and pinion are causedto move the rack with the sleeve and spindle in a doWIlward direction.

A key 2 formed with a projecting head and contacting at its point withthe hand lever 21 is mounted to slide in a'longitudinal groove formed inshaft 2. A slanting lug 24c projecting from one edge of the rack isarranged to intercept the head, of key 22 at a predetermined point inthe rotation of shaft 2 for moving said key with the hand lever inanoutward direct-ion whereby the plunger 1? is disengaged from the twinlevers. i

Spring actuated plungers 25 mounted in a. transverse opening formed inmember 14 Patented Apr. 9, 1912.

are each formed with a taper point adapted to slidably engage with theannular groove 18 for yieldingly maintaining the plunger 17 completelydisengaged from the twin levers. The contraction of the friction ringnow disengages the worm iwheeljfrom the shaft 2 and serves as a safetystop to the downward movement'of the spindle thcreby. A. graduated dial26 secured in rotative adjustment on the bearing 11 by meansof a handclamp 27 is provided with a. slant- .inglug 28. A pin 29 which projectsfrom plunger 17 is adapted to slidably engage with the slanting lug 28and thereby automatically move the plunger out ofeng'agement with thetwin levers for discontinuing the downward movement of the spindle andforming a depth gage to the hole being drilled corresponding to thepositiononthe dial of the pointer 31 which is rotatively movable withthe hand, lever. Said pointer may be secured in different lateraladjusted positions in relation to the hand lever as shown at 30 in 2 forobtaining accuracy of indication.

ln operation, the movement of the key 22 by means of the slanting lug24' at a predetermined point in the downward movement of the rack 7serves as an automatic *lun cr for discontinuin the movement of thespindle in a predetermined intermediate point of its descentcorresponding in amount with the indicated graduation on the dial,thereby forming an automatic depth stop.

- in t with. the reclr for engagement with the worm wheel.

The spindle may also be stopped at any point in its longitudinalmovement by means of the hand lever 21 and its connections for releasingthe friction ring from Said le also serves to turn the pinion for rais-131g spindle when desired.

Having fully described my improvements, what I claim as my invention anddesire to secure by Letters Patent of the. United States is 1. Thecombination of a rotatively driven member, a shaft provided with apinion, a clutch for engaging the shaft with said member, a spindlesleeve provided-with 'arack engaging with the pinion and means carriedby the shaft and actuated by the reek for disengaging the clutch.

2. A spindle stop comprising a rotatively driven member, a rack andpinion, hand actuated connections including a clutch enthe membertherewith, and a movable carried by the pinion intoengagedisengaging thecine-oh.

In spindle stop the combination with a rctstively driven member, of arack and pinion, connections including a clutch for pinion and providedwith a stop, and means rotated with the pinion into engagement with thestop for disengaging the clutch.

5. A spindle stop comprising a shaft provided with a pinion, a graduateddial depth a 'e concentric therewith means for securing said gage indiii'erent rotative positions,

a rotatively driven member concentric with the shaft, connectionsbetween the shaft and the member including a clutch, a spindle sleeveprovided with a rack engaging with the pinion, a pointer movable withthe shaft to different ,graduations on the gage, and automatic mechanismconstructed and arranged to disengage the clutch simultaneously with theregistration of the pointer with a predetermined point on the gage.

6. The combination of a spindle sleeve provided'with a rack, a shaftprovided with a pinion in engagement with the rack, a rotatively drivenmember mounted to turn thereon, clutch connections between said theshaft for actuating said connections, and

means actuated by the rack for actuating member and shaft, a hand-levercarried by

